.top_c{
    width: 400px;
    height: 200px;
    border: 1px solid rebeccapurple;
    background: blueviolet;
}
.menu_c{
    width: 400px;
    height: 200px;
    border: 1px solid rebeccapurple;
    background: blueviolet;
}

.left_c{
    width: 100px;
    height: 300px;
    border: 1px solid rebeccapurple;
    background: blueviolet;
    position: absolute;
    left: 0;
    top: 100px;
}
